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Monday, May 18, 2020 | History

5 edition of The seven aspects of a general map projection found in the catalog.

The seven aspects of a general map projection

Thomas Wray

The seven aspects of a general map projection

by Thomas Wray

  • 46 Want to read
  • 40 Currently reading

Published by B. V. Gutsell in Toronto .
Written in English

    Subjects:
  • Map projection.

  • Edition Notes

    Other titlesCanadian cartographer ; v. 11 (Supplement 2)
    StatementThomas Wray.
    SeriesCartographica ;, monograph no. 11
    Classifications
    LC ClassificationsGA110 .W72
    The Physical Object
    Pagination72 p. :
    Number of Pages72
    ID Numbers
    Open LibraryOL5248492M
    ISBN 100919870104
    LC Control Number75320782
    OCLC/WorldCa1358699

    THE GUIDE. Each text book has been rated with from zero to four globes for the presentation of map projections. A summary of all books in table form is available as page 1 and page Bodger, J. A. N. Principles of Cartography Brannon, Gary. Making a map and, more generally, the process of mapping involve a range of decisions and choices. From the selection of the appropriate map scale and map projection to deciding which features to map and to omit, mapping is a complex blend of art and science. In fact, many historical maps are indeed viewed like works of art, and rightly so.

    Conic Projections. A conic projection is derived from the projection of the globe onto a cone placed over it. For the normal aspect, the apex of the cone lies on the polar axis of the the cone touches the Earth at just one particular parallel of latitude, it is called made smaller, the cone will intersect the Earth twice, in which case it is called secant. A map projection uses mathematical formulas to relate spherical coordinates on the globe to flat, planar coordinates. Different projections cause different types of distortions. Some projections are designed to minimize the distortion of one or two of the data's characteristics. A projection could maintain the area of a feature but alter its shape.

    Oblique and equatorial aspects: linear scale is true from the point of tangency. In all aspects the Azimuthal Equidistant shows distances true to scale when measured between the point of tangency and any other point on the map. Projection is mathematically based on a plane tangent to the earth. The entire earth can be represented. LIAM E. GUMLEY, in Practical IDL Programming, MAPPING. Map projections may be defined in IDL Direct Graphics. When a map projection is in effect, the data coordinates for the current graphics window or device correspond to longitude (x-axis) and latitude (y-axis) in fractional degrees, and the oplot, plots, xyouts, and contour procedures plot in terms of longitude and latitude.


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The seven aspects of a general map projection by Thomas Wray Download PDF EPUB FB2

Additional Physical Format: Online version: Wray, Thomas. Seven aspects of a general map projection. Toronto: B.V. Gutsell, © (OCoLC)   The Seven Aspects of a General Map Projection Thomas Wray Related information 1 Surveys and Mapping Branch Department of Energy, Mines and Resources Ottawa, CanadaCited by: The issue of map projection aspects was analysed by scientists a long time ago (e.g.

Herz Wray, T. (): The Seven Aspects of a General Map Projection, Supplement No. 2 to (“Text-Book. The book is very attractive; most map projection books stick to black and white line drawings illustrating projections and geometric properties, but this book uses color in a very helpful way. It also provides its information in a well-organized manner; each of the projections it describes has a page devoted to it, with an illustration Cited by: This book reflects several aspects of the development of modern mathematical cartography, especially the theory and methods of map projection transformation.

Map projection transformation is an area of research in mathematical cartography newly developed over the last 25 years. Map projection concerns the science of mathematical cartography, the techniques by which the Earth's dimensions, shape and features are translated in map form, be that two-dimensional paper or two- or three- dimensional electronic representations.

The central focus of this book is on the theory of map projections. Mathematical cartography also takes in map scales and their variation, the Reviews: 1.

This is a digital copy of a book that was preserved for generations on library shelves before it was carefully scanned by Google as part of a project to make the world’s books discoverable online.

It has survived long enough for the copyright to expire and the book to enter the public Size: 8MB. Map projections are created for certain purposes and should be used for those purposes.

In the end each and every map projection has a place, and there is no limit to the amount of projections that can be created. Reference. Geokov. Map Projections: Types and Distortion Patterns. Web access 28 November Author: Elizabeth Borneman. Start studying Map Projections. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Elements of map projection with applications to map and chart construction Item Preview remove-circle Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.).Pages: A family of map projections that includes as special cases Mollweide projection, Collignon projection, and the various cylindrical equal-area projections.

Wagner VI: Pseudocylindrical Compromise K. Wagner: Equivalent to Kavrayskiy VII vertically compressed by a factor of /. Collignon: Pseudocylindrical Equal-area. In cartography, a map projection is a way to flatten a globe's surface into a plane in order to make a map.

This requires a systematic transformation of the latitudes and longitudes of locations from the surface of the globe into locations on a plane.

All projections of a sphere on a plane necessarily distort the surface in some way and to some extent. Projection Aspect. A map projection's aspect is its orientation on the page or display screen. If north or south is straight up, the aspect is said to be equatorial; for most projections this is the normal aspect.

When the central axis of the developable surface is oriented east-west, the projection's aspect is. It is a projection that has wide availability. After National Geographic began using the Robinson projection for their global map needs, its use began to take off in classrooms around the world.

It eliminates the visualization issues that come with the flat Mercator perspective that was first created in for navigation purposes. This book reflects several aspects of the development of modern mathematical cartography, especially the theory and methods of map projection transformation.

Map projection transformation is an area of research in mathematical cartography newly developed over the last 25 years. It is widely used in surveying and computer-assisted cartography Cited by: In general, distortion increases with the distance from the point of contact.

Many common map projections are classified according to the projection surface used: conic, cylindrical, or planar. Learn more about the conic projection. Learn more about the cylindrical projection. Learn more about the planar projection.

Projection types illustrated. During the 20th century, the National Geographic Society, various atlases, and classroom wall cartographers switched to the rounded Robinson Projection. The Robinson Projection is a projection that purposely makes various aspects of the map slightly distorted to produce an attractive world map.

Indeed, inseven North American professional Author: Matt Rosenberg. Try This: Album of Map Projections John Snyder and Phil Voxland () published an Album of Map Projections that describes and illustrates many more examples in each projection category.

Excerpts from that important work are included in our Interactive Album of Map Projections, which registered students will use to complete Project 1. Groups of map projections, a brief introduction.

Since you can filter by projection type (in the selection by thumbnail), I’d like to offer a brief introduction to the different types available. I will confine myself mostly to optical differences, I am not going to explain how they are constructed mathematically or why they are called»cylindric«etc.

Page discuss map scale and the basics of coordinate systems. Map projections are introduced on pagesand pages present some widely used examples.

Several common projected coordinate systems are discussed on pages Page 22 covers use of map projections in group display. Resources for further study are presented on page. There are many different ways of display the geography of the world, with the Robinson and Mercator projections amongst the most popular.

A map of the our world. Map projections are a systematic transformation of longitudes and latitudes of a location on the surface of the sphere. Map projections are important in creating maps with map Author: John Misachi.

Proponents of the Peters projection map claim that their map is an accurate, fair, and unbiased depiction of the world when comparing theirs to the almost-defunct Mercator map, which features enlarged depictions of euro-centric countries and continents.

Mercator map enthusiasts defend the ease of navigation of their : Matt Rosenberg.General Aspects of Map Projections: A projection method is a conversion describing the mapping from a mathematical earthmodel (spheroid like a sphere or ellipsoid) to the plane.

It is not possible to map from a curved surface like a sphere or ellipsoid to a plane without distortion.